darkcomet | 66bf652ccd1e570c51dd1d869074823875694d1e57ab4ee6ed3da18135e3ace7

General

Target

f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe
Size

328KB
MD5

f9fa90288430f91833addc4ce54347a0
SHA1

492120ab7a0645c6d742acb56d303999c008c475
SHA256

66bf652ccd1e570c51dd1d869074823875694d1e57ab4ee6ed3da18135e3ace7
SHA512

65e934356c43bd2518fbf51c9ff9f15a502332984d2d41feef62576e2a29e8d4d21eb4180d3c15aa96ab199f38e3f78204ffbfd62f4a4a5cfd9a286833ed7632
SSDEEP

6144:zmyc5Y52bekxSO8y9GsfGU3gLahNiKZWAqfuexh9rYsWP89O1:zm+on9bfVhNQAwxjWP8Q1

Score

10^/10

darkcomet s4league hacked discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

S4League hacked

C2

127.0.0.1:1604

81.14.31.39:1604

darkhackgael.no-ip.info:1604

Mutex

DC_MUTEX-VY74S8K

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
S2kPWNi5ysCM
install
true
offline_keylogger
true
persistence
false
reg_key
MicroUpdate

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

pid	Process
1548	msdcsc.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	vbc.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3964 set thread context of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4544-3-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/4544-5-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/4544-7-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/4544-9-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/4544-8-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/4544-10-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/4544-26-0x0000000000400000-0x00000000004CA000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4544	vbc.exe
Token: SeSecurityPrivilege	4544	vbc.exe
Token: SeTakeOwnershipPrivilege	4544	vbc.exe
Token: SeLoadDriverPrivilege	4544	vbc.exe
Token: SeSystemProfilePrivilege	4544	vbc.exe
Token: SeSystemtimePrivilege	4544	vbc.exe
Token: SeProfSingleProcessPrivilege	4544	vbc.exe
Token: SeIncBasePriorityPrivilege	4544	vbc.exe
Token: SeCreatePagefilePrivilege	4544	vbc.exe
Token: SeBackupPrivilege	4544	vbc.exe
Token: SeRestorePrivilege	4544	vbc.exe
Token: SeShutdownPrivilege	4544	vbc.exe
Token: SeDebugPrivilege	4544	vbc.exe
Token: SeSystemEnvironmentPrivilege	4544	vbc.exe
Token: SeChangeNotifyPrivilege	4544	vbc.exe
Token: SeRemoteShutdownPrivilege	4544	vbc.exe
Token: SeUndockPrivilege	4544	vbc.exe
Token: SeManageVolumePrivilege	4544	vbc.exe
Token: SeImpersonatePrivilege	4544	vbc.exe
Token: SeCreateGlobalPrivilege	4544	vbc.exe
Token: 33	4544	vbc.exe
Token: 34	4544	vbc.exe
Token: 35	4544	vbc.exe
Token: 36	4544	vbc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 3964 wrote to memory of 4544	3964	f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe	83
PID 4544 wrote to memory of 1548	4544	vbc.exe	84
PID 4544 wrote to memory of 1548	4544	vbc.exe	84
PID 4544 wrote to memory of 1548	4544	vbc.exe	84

C:\Users\Admin\AppData\Local\Temp\f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f9fa90288430f91833addc4ce54347a0_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Adds Run key to start application
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4544
- - C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
    "C:\Windows\system32\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/3964-0-0x00000000745F2000-0x00000000745F3000-memory.dmp

Filesize
4KB

Download
memory/3964-1-0x00000000745F0000-0x0000000074BA1000-memory.dmp

Filesize
5.7MB

Download
memory/3964-2-0x00000000745F0000-0x0000000074BA1000-memory.dmp

Filesize
5.7MB

Download
memory/3964-14-0x00000000745F0000-0x0000000074BA1000-memory.dmp

Filesize
5.7MB

Download
memory/4544-3-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/4544-5-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/4544-7-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/4544-9-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/4544-8-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/4544-10-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/4544-26-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads